Paper container



PAPER CONTAINER Filed March 25'. 1921 Feb. 5,

Patented' Feb 5, E92@ `"if ECE,

ARLINGTON MOF/ORE. BOSTON, MASSACHUSETTS.

PAPER CONTNER.

Auplication filed March 23, 1921. Serial No. fd.

-To all 'whom it may concern.'

Be it known that f, ARLINGTON Moonn,

a citizen of the United States, and a resident of Boston, county of Suffolk, State of 6 Massachusetts, have invented an Improvement in Paper Containers, of which the following is a specification.

rlhe present invention relates to paper containers or receptacles, and more partic- 10 ularly to certain improvements in the forni of container disclosed in my pending application, Serial No. 336,292, in which a continuation of the side-wall is folded and 'pressed together, to form a re-inforced neck, and a seat and a retaining shoulder for a disk-like cap or closure, whereby, when the cap is pushed down against the seat, it will be retained thereon.

The objects of the present invention are to simplify the construction ofthe neck portion of the receptacle, so as to reduce the amount of stock necessary for the construction, without decrease of efficiency, and to provide a construction in which the closure may be more easily forced into sealing position; and the receptacle will be more effectively sealed thereby, especially in case of variation in thickness of the closure, than it will in the case of said prior construction.

I accomplish these objects by providing ,the construction shown in the accompanying drawing, in which Figure 1 is a view, partly in elevation and partly in central vertical section, of a paper Iirkn embodying my invention. AFigs. 2 and 3 are detail sectional views showing the neck of the firkin before the closure is pushed into its final position.

ln the embodiment of the present invention the receptacle comprises a tapering sidewall, of uncalendered paper stock, and a bottom 2, which has a permanentlyrsealed connection therewith, the particular form of joint therebetween being hereinafter more fully described. The neck of the receptacle is formed from a continuation ofthe sidewall,vwhich is bent outwardly, approximately horizontally, or parallel to the bottom,

and extended upwardly through a curve of nearly 180 degrees in length, forming an outer cap-retaining neck portion 3. Froml is bent sharply outward and extended upward at an outward inclination, and then is bent or folded inward and extended reversely, forming a flaring rim composed of an outer rim portion 4, an inner rim portion 5, and a fiattened connecting edge portion 6, the rim thus formed having an angle of taper, or flare, which is somewhat greater than that of the side wall.

From the inner end of the inner rim portion 5, the stock is extended outward, and then inward through a curve of nearly 180 Idegrees in length, forming an inner capretaining neck portion 7, and, at the point where it is flush with the inner surface of the side wall, the stock is bent reversely, to form a terminal portionv8, which is extended between the outer portion 3 and inner` portion 7 and terminates at the inner ends of the Haring rim portions 4 and 5. The por.- tions 3, 7, and 8 are moulded to form an internal cap-receiving groove and provide a cap-supporting seat 9 and a cap-retaining shoulder 10. The surface of the portion 11, which connects the inner portion 7 and terminal portion 8, is pressed fiat, so that its surface is continuous with the inner surface of the side wall, and a cap or closure 12, of stiff` cardboard, is provided, which is adapted to be sprung into the cap-receiving A oove. lin the formation of the neck. the folds are subjected to a strong outward lateral pressure by suitably shaped dies, and, in practice,

this pressure first is applied to the middle portion of the fold, at the point at which the cap-retaining groove is formed. This pressure causes the terminal portion 8 to be pressed in such a manner that its end portion is tapered to a sharp edge and its adJacent portion is crowded back to the point at which it is bent reversely. The adjacent surfaces of the folds are thus pressed together into intimate Contact, so that they cohere, and the folds are consolidated, so Vthat they; become a practically homogeneous mass. The rim portions 4 and 5 are thus caused to cohere with each other, and the portions 3 and 7 are caused to cohere with the opposite sides of the terminal portion 8, except that this high degree of pressure is not applied to the horizontal portion forming the seat 9, or the point 11 at which the stock is bent reversely. While some inward pressure is necessary atthis point, this pressure is not sufficient to cause the surfaces to cohere, but it is so gaged that a small open space will be provided, when the pressure is removed, between the folds adjacent the connecting portion ll, as indicated at 13 in Figures Qand 3; that is, the pressure which is applied to the seat 9 is insufficient to de.- stroy the resiliency of the fibres at this point, so that the seat will be somewhat resilient. rl`he width of the cap-retaining groove, before the cap is forced into position, 1s thus made slightly less than the thickness of the cap l2, which is made of solid, wellcalendered stock. Consequently, when the cap is first pressed into contact with the seat 9, it will not have been pushed down far enough to permit it to be sprung into the groove beneath the shoulder 10, as indicated in Figure 3. If, however, a substantial inward pressure is applied to the cap, the seat 9 will be somewhat compressed, to permit the cap to be forced past the shoulder, so that the latter may snap in over the cap, or into engagement with its upper side, as shown in Figure l, in which latter position the resil iency of the seat will cause the cap to be pressed against the shoulder with a force corresponding to that required to press it into position. The cap is thus more tightly sealed than it will be when the seat ispractically unyielding, as in my said prior construction. Moreover, the material from which the cap is constructed is liable to vary slightly in thickness, and, when the sides of.

the groove are rigid and designed to receive a cap of a certain thlckness, variations m thickness of the cap are likely either to cause difiiculty in inserting the cap, or to permit leakage if there is any loosening between the cap and the groove.

With the present construction the rim portion is composed of only two plys of the stock, instead of three, so that it has greater resiliency and yields more readily to the cap when pressed into position than with the three-ply construction. Consequently, the shoulder 10, which must be pushed aside to permit the cap to seat, is permitted to yield more easily than in said prior construction; although, when in position, the shoulder is held in engagement with the upper outside of the cap with sufficient force to prevent the possibility of accidental release.

The point at which the greatest rigidly, or strength of construction is desired, is at the base portion of the neck, or the portion in which the cap-retaining groove is formed. At this point the three-ply construction is provided and gives strength to the whole container and permanency to the form 0f the cap-retaining groove. As previously stated, during the process of formation, the stock, of which the terminal portion is composed, is pushed back to some extent towards the inner surface of the side wall, but, if the terminal portion were extended to the bottom of the fold, at thetop of the rim, as in the previous construction, the end portion would be pinched between the folds, so as to prevent the stock from being pushed back to the bend, so as to cause the slight fullness, at this point, which is secured with the present construction.

In the formation of the joint between the bottom and the side wall, the end portion of the turned-down flange 14, of the bottom 2, is folded inward to form L rib or bead l5, and the continuation of the side wall is folded about the flange and bead and then folded inward or doubled at its end portion, to form a similar bead 16, which will lill the space between the bead l5 and the bottom 2, so that the two' beads abut, to form a single ply of stock within the rib thus formed.A 1n the process of formation of the joint, the die, which applies the lat eral pressure to the inner side ot' the joint, is formed so as to apply a greater pressure to the reversely folded portion 16, and to the end portion of the reversely folded portion l5, than to the other portions of the rib, with the result that the end portion of the port-ion l5 is pinched between the surrounding portions of the side-wall. The folds are lall cohcsively connected by the application o he heavy pressure thereto, so that they will not separate laterall while they are firmly locked against longitudinal separation by the abutting beads. This construction is as effective from a mechanical standpoint as the corresponding construction of said prior application, and is less diflicult to make in practice.

I claim:

1. In a paper container, a side-wall having a re-inforced neck formed from a continuation of the stock thereof, and comprising inner and outer cap-retaining portions, oppositely folded inner 'and outer rim-portions extending from one to t-he other of said cap-retaining portions, and a,ter`minal portion extending reversely from said inner cap-retaining portion between the same and said outer cap-retaining portion and terminating adjacent said rim portions, the folds forming said rim portions being consolidated with each other, and the inner and outer cap-retaining portions being consolidated with said terminal portion.

2. In a paper container, a side-wall having a re-iiforced neck formed from a continuation of the stock thereof and comprising inner and outer cap-retaining portions, an oppositely folded rim-portion intermediate said cap-retaining portions, and a tering a re-inforced nager minal portion extended from said inner capretaining portion between the' same and the outer cap-retaining portion, the folds of said rim portion being cohesively engaged with each other, and said cap-retaining portions being cohesively engaged with the opposite sides of said terminal portion and moulded therewith to provide an internal cap-retaining groove.

3. In a paper container, a side-wall having a re-inforced neck formed from a continuation of the stock thereof folded to provide an inner and an outer cap-retaining portion, and a terminal portion reversely folded to extend between said inner and outer portions, said neck being moulded t0 form an internal cap-retaining groove and the portions of the folds thereof forming the outer side of the groove being compressed to form. a solid, cohesively-connected mass, the folds at the inner side of said groove being relatively uncompressed to provide a yielding cap-engaging seat.

4. lnfa paper container, a side-wall having a re-inforced neck formed from a continuation of the stock thereof, folded to provide an inner and an outer cap-retaining portion, and a terminal portion reversely folded and extended between said inner and outer portions, said neck being moulded to form an internal ca -retaining groove andthe portions lof the olds thereof forming the outer side of the groove being compressed to form a practically solid, homogeneous ma, and the cap-supporting seat'at the inner side of the groove having its edge terminating in the end of the reverse fold between the inner and terminal portions, said reverse fold being'relatively uncompressed to permit the seat to yield.

5.-In a paper container, a side-wall having a re-inforced neck formed from a continuation of the stock thereof folded to provide an inner and an outer cap-retaining portion and a terminal portion reversely folded to extend therebetween, and moulded to form an inwardly facing cap-retaining shoulder and an outwardly facing cap-engaging seat, the fold portions formin said shoulder being consolidated to a practically unyielding condition, and those forming said seat being adapted to yield to pressure applied to a cap when pressed thereagainst.

6. In a paper container, a side-wall havk formed from a continuation of the stock thereof folded to provide an inner and an outer cap-retaining portion and a,terminal portion reversely folded to extend therebetween, said neckbeing moulded to form an internal cap-retaining groove, a disc-like ca of greater thickness than the normal wi th of said groove, the fold portions at the outer side of the groove being compressed to a practically unyielding condition of those at the inner side being relatively uncompressed and adapted to yield to permit the cap -to be sprung into the groove.l

In a paper container, a side wall having a re-inforced neck formed from a continuation of the stock thereof folded to provide an inner and an outer cap-retaining portion and a terminal portion reversely folded to extend therebetween, said neck being Amoulded to form an internal cap-re'- taining groove and provide an inwardly facin cap-retaining shoulder and an outward y facing cap-engaging seat having its edge Hush with the inner surface of the side wall, the portions of the folds thereof forming said shoulder being compressed to form a substantially solid unyielding mass, and the portions forming said seat directly over the side wall being relatively uncompressed to permit said seat to yield.

8. In a paper container, a side-wall having a continuation of the stock thereof folded to provide an inner and an outer neck portion and a terminal portion reversely folded to extend therebetween, said folds being pressed together to form a three-ply neck and moulded to form an internal capreceiving groove, the portions of the plys at the bottom and outer side of the groove being compressed to form a cohesive relatively unyielding mass, and the plys of the inner neck and terminal portions at the inner side of the groove having their connect- ,ing bent port-ion terminating at the inner surface of the side-wall and their adjacent surfaces in close proximity to the bend normally yieldingly separated to provlide a compressible seat for a cap.

9. ln a paper container, a side-wallhaving `a re-inforced neck formed from a continuation of the stock thereof and comprising inner and outer cap-retaining portions, oppositely folded inner and outer rim portions extending from one to the other of said cap-retaining portions, and a terminal portion extended reversely from said inner cap-retaining portion between the same and said outer cap-retaining portion and terminating adjacent the inner ends of said rim portions, the folds forming said rim-portions being consolidated with each other and outwardly flared, and said inner and outer cap-retaining portions being pressed into cohesive engagement with the opposite side of said terminal portion and moulded to form an internal cap-receiving groove, to which the inner surface of said rim leads.

10. ln a paper container, a side-wall having a re-inforced-neck formed from a continuation of the stock thereof and comprising inner and outer cap-retaining portions, oppositely folded inner and outer rimportions extending from one to the other of .said cap-retaining portions, and a terminal portion extended reversely from said inner ilv lli

lll

cap-retaining portion between the same and said outer cap-retaining portion and terminating adjacent the inner ends of said rim poi-tions, the folds forming said rim portions being pressed into cohesive engagement with each other, to form a rim, and the folds of said cap-retaining portions being pressed into cohesive engagement with said terminal portion and moulded to form an internal cap-retaining groove, said terminal portion opposite the bottom and outer Sle of the groove being tapered to a sharp e ge.

In testimony whereof, I have signed my name to this specification.

ARLINGTON MOORE. 

